EP1534646B1 - Silicon oxide slurry and method for producing such slurry - Google Patents
Silicon oxide slurry and method for producing such slurry Download PDFInfo
- Publication number
- EP1534646B1 EP1534646B1 EP03730922A EP03730922A EP1534646B1 EP 1534646 B1 EP1534646 B1 EP 1534646B1 EP 03730922 A EP03730922 A EP 03730922A EP 03730922 A EP03730922 A EP 03730922A EP 1534646 B1 EP1534646 B1 EP 1534646B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- slurry
- polysaccharide
- amorphous silica
- water
- silica
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/146—Silica fume
- C04B18/147—Conditioning
- C04B18/148—Preparing silica fume slurries or suspensions
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Definitions
- the present invention relates to an additive for oil well cement containing amorphous silica particles and silica flour and to a method for producing such additive
- the cement slurry produced according to the method of EP-B 467921 is particularly useful for cementing oil wells at high temperatures of above 100°C as it has been found that this prevent long time reduction of strength of the cement.
- the present invention relates to a slurry containing water, amorphous silica particles having a particle size less then 1 micrometer and silica flour having a particle size between 2 and 200 ⁇ m, which slurry is characterized in that it contains a polysaccharide.
- the polysaccharide is a cellulose derivate selected among xanthan, carboxymethylcellulose, hydroxymethylcellulose, hydroxyethylcellulose or mixtures of these compounds.
- the slurry contains between 0.01 and 3 grams of polysaccharide pr. litre of slurry and more preferably between 0.05 and 1.5 grams of polysaccharide pr. litre of slurry.
- the amount of polysaccharide pr. litre of slurry is adjusted according to the chain length of the polysaccharide.
- the amount of polysaccharide in the slurry is in the upper end of the ranges and when using polysaccharide having a long chain length the amount is in the lower part of the range.
- the slurry optionally contains one or more of dextrin, guar gum and locust bean gum.
- the slurry according to the invention may contain varying amounts of amorphous silica and silica flour, but the amount of amorphous silica is generally between 15 - 50 % by weight based on the weight of the slurry and the amount of silica flour is generally between 5 and 60 % by weight based on the weight of the slurry.
- the total amount of dry matter in the slurry is preferably between 40 and 80 % by weight based on the weight of the slurry.
- the slurry according to the invention is very stable and shows little or no tendency of settling even after two to three months storage.
- the slurry can thus be stored and transported to the sites where it is mixed into cement slurries.
- the slurry according to the invention is compatible with cement slurries in that it gives an acceptable rheology of the cement slurries.
- the present invention relates to a method for the production of a slurry containing water, amorphous silica having a particle size below 1 ⁇ m, and silica flour having a particle size between 2 and 200 ⁇ m, which method is characterized in that a polysaccharide is added to a slurry of water and amorphous silica, whereafter the silica flour is mixed into the slurry of amorphous silica.
- the polysaccharide is preconditioned in a water-containing medium for at least 15 minutes before it is added to the slurry of water and amorphous silica.
- the polysaccharide is preferably preconditioned in a slurry of water and amorphous silica.
- the polysaccharide added to the slurry of amorphous silica and water is a cellulose derivate such xanthan, carboxymethylcellulose, hydroxymethylcellulose, hydroxyethylcellulose or mixtures of these compounds.
- the silica flour is mixed into the slurry of water and amorphous silica using a high shear energy mixer.
- the polysaccharide is preferably added to the slurry of amorphous silica and water in an amount necessary to provide a content of polysaccharide in the final slurry of 0.01 to 3 grams pr. litre and more preferably in an amount of 0.05 and 1,5 grams pr litre.
- polysaccharide to the slurry of amorphous silica and silica flour results in a stable slurry with a strongly reduced tendency of settling resulting in a strongly increased shelf life of the slurries.
- the preconditioning of the polysaccharide has shown to even further improve the stability of the final slurry.
- polysaccharides gives acceptable rheological properties for oil well cement slurries containing the slurries according to the invention.
- polysaccharides are generally non-toxic compounds which are approved to be used in connection with oil well cements.
- xanthan pr. litre of final slurry was added to a slurry of amorphous silica and water containing 50 % by weight of amorphous silica.
- the xanthan had been preconditioned in a small part of the slurry of water and amorphous silica for 24 hours before it was added.
- 850 grams pr litre of final slurry of silica flour having a mean particle size of 25 ⁇ m was thereafter added to the slurry using a high shear mixer.
- the final slurry was stored in 100 ml glass cylinders for 34 days.
- the samples in the glass cylinders had a 2 mm top layer of water after 34 days, but no resistance was found when lowering a rod to the bottom of the cylinder.
- the samples were very fluid and when the cylinders were emptied no settling in was found in the bottom of the cylinders.
- a slurry according to the invention was made in the same way as described in Example 1, except that 0.22 grams of hydroxyethylcellulose was added instead of xanthan. The slurry was filled into a glass cylinder. After 1 week storage the slurry had a 10 mm top layer of water and no hard bottom layer was found.
- a slurry according to the invention was made in the same way as described in Example 1, except that 0.22 grams carboxymethylcellulose was added instead of xanthan. The slurry was filled into a glass cylinder. After 1 week storage the slurry had a 8 mm top layer of water and no hard bottom layer was found.
- a slurry of amorphous silica and silica flour containing xanthan according to the present invention and made according to Example 1 was added to an oil well cement slurry in an amount necessary to provide a total Si02 content in the cement slurry of 35 % by weight based on the weight of cement.
- the slurry had a density of 1.9 g/cm 3. This slurry is denoted slurry A
- cement slurry B was made by adding a slurry of amorphous silica and silica flour that did not contain a polysaccharide additive.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Silicon Compounds (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
Description
- The present invention relates to an additive for oil well cement containing amorphous silica particles and silica flour and to a method for producing such additive
- From
EP-B 467921 - The cement slurry produced according to the method of
EP-B 467921 - In order to make full economic and practical use of the method according to
EP-B 467921 EP-B 467921 - By the present invention it has now been provided a slurry of amorphous silica and silica flour and a method for production of such slurry which shows a strongly reduced tendency of settling and which is compatible with cement slurries and which does not contain any toxic additives.
- Thus, according to a first aspect, the present invention relates to a slurry containing water, amorphous silica particles having a particle size less then 1 micrometer and silica flour having a particle size between 2 and 200 µm, which slurry is characterized in that it contains a polysaccharide.
- According to a preferred embodiment the polysaccharide is a cellulose derivate selected among xanthan, carboxymethylcellulose, hydroxymethylcellulose, hydroxyethylcellulose or mixtures of these compounds.
- According to a further preferred embodiment the slurry contains between 0.01 and 3 grams of polysaccharide pr. litre of slurry and more preferably between 0.05 and 1.5 grams of polysaccharide pr. litre of slurry.
- The amount of polysaccharide pr. litre of slurry is adjusted according to the chain length of the polysaccharide. When using polysaccharides having a short chain length, the amount of polysaccharide in the slurry is in the upper end of the ranges and when using polysaccharide having a long chain length the amount is in the lower part of the range.
- In order to further increase the stabilizing effect of the polysaccharide, the slurry optionally contains one or more of dextrin, guar gum and locust bean gum.
- The slurry according to the invention may contain varying amounts of amorphous silica and silica flour, but the amount of amorphous silica is generally between 15 - 50 % by weight based on the weight of the slurry and the amount of silica flour is generally between 5 and 60 % by weight based on the weight of the slurry.
- The total amount of dry matter in the slurry is preferably between 40 and 80 % by weight based on the weight of the slurry.
- It has surprisingly been found that the slurry according to the invention is very stable and shows little or no tendency of settling even after two to three months storage. The slurry can thus be stored and transported to the sites where it is mixed into cement slurries. Further it has been found that the slurry according to the invention is compatible with cement slurries in that it gives an acceptable rheology of the cement slurries.
- According to a second embodiment the present invention relates to a method for the production of a slurry containing water, amorphous silica having a particle size below 1µm, and silica flour having a particle size between 2 and 200 µm, which method is characterized in that a polysaccharide is added to a slurry of water and amorphous silica, whereafter the silica flour is mixed into the slurry of amorphous silica.
- According to a preferred embodiment the polysaccharide is preconditioned in a water-containing medium for at least 15 minutes before it is added to the slurry of water and amorphous silica.
- The polysaccharide is preferably preconditioned in a slurry of water and amorphous silica.
- According to a preferred embodiment the polysaccharide added to the slurry of amorphous silica and water is a cellulose derivate such xanthan, carboxymethylcellulose, hydroxymethylcellulose, hydroxyethylcellulose or mixtures of these compounds.
- Preferably the silica flour is mixed into the slurry of water and amorphous silica using a high shear energy mixer.
- The polysaccharide is preferably added to the slurry of amorphous silica and water in an amount necessary to provide a content of polysaccharide in the final slurry of 0.01 to 3 grams pr. litre and more preferably in an amount of 0.05 and 1,5 grams pr litre.
- It has surprisingly been found that the addition of polysaccharide to the slurry of amorphous silica and silica flour results in a stable slurry with a strongly reduced tendency of settling resulting in a strongly increased shelf life of the slurries. The preconditioning of the polysaccharide has shown to even further improve the stability of the final slurry. Further it has been found that the addition of polysaccharides gives acceptable rheological properties for oil well cement slurries containing the slurries according to the invention. Finally polysaccharides are generally non-toxic compounds which are approved to be used in connection with oil well cements.
- 0,44 grams of xanthan pr. litre of final slurry was added to a slurry of amorphous silica and water containing 50 % by weight of amorphous silica. The xanthan had been preconditioned in a small part of the slurry of water and amorphous silica for 24 hours before it was added. 850 grams pr litre of final slurry of silica flour having a mean particle size of 25 µm was thereafter added to the slurry using a high shear mixer. The final slurry was stored in 100 ml glass cylinders for 34 days. The samples in the glass cylinders had a 2 mm top layer of water after 34 days, but no resistance was found when lowering a rod to the bottom of the cylinder. The samples were very fluid and when the cylinders were emptied no settling in was found in the bottom of the cylinders.
- For comparison purposes an identical slurry was made, but without the addition of xanthan. After 7 days it was found that excessive settling had occurred. The cylinder had a 25 mm top layer of water and a hard layer was found in the bottom of cylinder which layer could not be redispersed. The hard layer consisted of silica flour.
- A slurry according to the invention was made in the same way as described in Example 1, except that 0.22 grams of hydroxyethylcellulose was added instead of xanthan. The slurry was filled into a glass cylinder. After 1 week storage the slurry had a 10 mm top layer of water and no hard bottom layer was found.
- A slurry according to the invention was made in the same way as described in Example 1, except that 0.22 grams carboxymethylcellulose was added instead of xanthan. The slurry was filled into a glass cylinder. After 1 week storage the slurry had a 8 mm top layer of water and no hard bottom layer was found.
- The above examples show that the slurry according to the invention has a strongly reduced settling compared to the prior art slurry.
- A slurry of amorphous silica and silica flour containing xanthan according to the present invention and made according to Example 1 was added to an oil well cement slurry in an amount necessary to provide a total Si02 content in the cement slurry of 35 % by weight based on the weight of cement. The slurry had a density of 1.9 g/cm3. This slurry is denoted slurry A
- For comparison purpose it was made an identical cement slurry B except that cement slurry B was made by adding a slurry of amorphous silica and silica flour that did not contain a polysaccharide additive.
- The rheological properties of the two cement slurries were measured according to API Specification 10 and the results are shown in Table 1.
TABLE 1 Cement slurry A B Rheology (20°C) Plastic viscosity, cp 64.5 48 Yield point, 1b/100ft3 8.5 3 Rheology (88°C) Plastic viscosity, cp 45 37.5 Yield point, lb/100ft3 6 1.5 1lb/100ft3 = 0.16g/l - As can be seen from Table 1, the rheological properties of a cement slurry containing the slurry of amorphous silica and silica flour according to the invention does not deviate much from the same properties of the prior art slurry B and are well within the ranges accepted for oil well cement slurries.
Claims (11)
- Slurry containing water, amorphous silica particles having a particle size less than 1 µm and silica flour with a particle size between 2-200 µm, characterised in that the slurry contains a polysaccharide as a stabilizer, in an amount of between 0.01 and 3 grams of polysaccharide pr. litre of slurry.
- Slurry according to Claim 1, characterised in that the polysaccharide is a cellulose derivate selected among xanthan, carboxymethylcellulose, hydroxymethylcellulose, hydroxyethylcellulose and mixtures of these compounds.
- Slurry according to Claim 1, characterised in that the slurry contains between 0.05 and 1.5 grams of polysaccharide pr. litre of slurry.
- Slurry according to Claim 1-3, characterised in that the slurry further contains one or more of dextrin, guar gum and locust bean gum.
- Method for the production of a slurry containing water, amorphous silica having a particle size below 1 µm, and silica flour with a particle size between 2-200 µm, characterised in that a polysaccharide is added to a slurry of water and amorphous silica, whereafter the silica flour is mixed into the slurry of amorphous silica.
- Method according to Claim 5, characterised in that the polysaccharide is preconditioned in a water containing medium.
- Method according to Claim 6, characterised in that polysaccharide is preconditioned in a slurry of water and amorphous silica.
- Method according to Claim 5, characterised in that the silica flour is mixed into the slurry of water and amorphous silica using a high shear energy mixer.
- Method according to Claim 5, characterised in that the polysaccharide is added to the slurry of amorphous silica and water in an amount necessary to provide a content of polysaccharide in the final slurry of 0.01 to 3 grams pr. litre.
- Method according to Claim 9, characterised in that the polysaccharide added to the slurry of amorphous silica and water in an amount necessary to provide a content of polysaccharide in the final slurry of 0.1 and 1.5 grams pr. litre.
- Method according to Claim 1-9, characterised in that the polysaccharide added is a cellulose derivate selected among xanthan, carboxymethylcellulose, hydroxymethylcellulose, hydroxyethylcellulose and mixtures of these compounds.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO20022884 | 2002-06-17 | ||
NO20022884A NO316509B1 (en) | 2002-06-17 | 2002-06-17 | Silica slurry and process for preparing such slurry |
PCT/NO2003/000135 WO2003106368A1 (en) | 2002-06-17 | 2003-04-24 | Silicon oxide slurry and method for producing such slurry |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1534646A1 EP1534646A1 (en) | 2005-06-01 |
EP1534646B1 true EP1534646B1 (en) | 2008-08-06 |
Family
ID=19913730
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03730922A Expired - Lifetime EP1534646B1 (en) | 2002-06-17 | 2003-04-24 | Silicon oxide slurry and method for producing such slurry |
Country Status (12)
Country | Link |
---|---|
US (1) | US7393407B2 (en) |
EP (1) | EP1534646B1 (en) |
AT (1) | ATE403631T1 (en) |
AU (1) | AU2003241221A1 (en) |
BR (1) | BR0311528B1 (en) |
CA (1) | CA2489486C (en) |
DE (1) | DE60322714D1 (en) |
DK (1) | DK1534646T3 (en) |
EA (1) | EA008739B1 (en) |
MX (1) | MXPA04012028A (en) |
NO (1) | NO316509B1 (en) |
WO (1) | WO2003106368A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9834719B2 (en) | 2010-11-30 | 2017-12-05 | Schlumberger Technology Corporation | Methods for servicing subterranean wells |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9512346B2 (en) * | 2004-02-10 | 2016-12-06 | Halliburton Energy Services, Inc. | Cement compositions and methods utilizing nano-hydraulic cement |
US9206344B2 (en) * | 2007-05-10 | 2015-12-08 | Halliburton Energy Services, Inc. | Sealant compositions and methods utilizing nano-particles |
US8685903B2 (en) * | 2007-05-10 | 2014-04-01 | Halliburton Energy Services, Inc. | Lost circulation compositions and associated methods |
US8586512B2 (en) * | 2007-05-10 | 2013-11-19 | Halliburton Energy Services, Inc. | Cement compositions and methods utilizing nano-clay |
US9512351B2 (en) | 2007-05-10 | 2016-12-06 | Halliburton Energy Services, Inc. | Well treatment fluids and methods utilizing nano-particles |
US9199879B2 (en) | 2007-05-10 | 2015-12-01 | Halliburton Energy Serives, Inc. | Well treatment compositions and methods utilizing nano-particles |
US8476203B2 (en) | 2007-05-10 | 2013-07-02 | Halliburton Energy Services, Inc. | Cement compositions comprising sub-micron alumina and associated methods |
US20100270016A1 (en) * | 2009-04-27 | 2010-10-28 | Clara Carelli | Compositions and Methods for Servicing Subterranean Wells |
NO334511B1 (en) | 2010-07-26 | 2014-03-24 | Elkem As | Aqueous slurry of amorphous silica and process for making such slurry |
US9950952B2 (en) | 2010-11-30 | 2018-04-24 | Schlumberger Technology Corporation | Methods for servicing subterranean wells |
EP2559678A1 (en) * | 2011-08-16 | 2013-02-20 | Siemens Aktiengesellschaft | Pressure-cast slip and fire-resistant ceramic for gas turbine assemblies produced using the same |
US8944165B2 (en) | 2013-01-11 | 2015-02-03 | Halliburton Energy Services, Inc. | Cement composition containing an additive of a pozzolan and a strength retrogression inhibitor |
CN105567192B (en) * | 2014-10-13 | 2019-01-04 | 中国石油化工股份有限公司 | A kind of well cementation nanometer titanium dioxide silicon emulsion, preparation method and application |
CN105567191B (en) * | 2014-10-13 | 2018-09-25 | 中国石油化工股份有限公司 | A kind of micro- silicon suspension of Weak Gels, preparation method and application |
AU2019232570A1 (en) | 2018-03-09 | 2020-10-01 | Dustin A. Hartman | Novel compositions for improved concrete performance |
BR112020019084A2 (en) | 2018-03-22 | 2020-12-29 | Dustin A. Hartman | METHOD FOR PREPARING AN IMPROVED FINISHED CONCRETE PRODUCT |
US11866366B2 (en) | 2019-09-03 | 2024-01-09 | Specification Products, Inc. | Wear-resistant concrete formulations and methods for their preparation |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4557763A (en) * | 1984-05-30 | 1985-12-10 | Halliburton Company | Dispersant and fluid loss additives for oil field cements |
NO167649C (en) | 1989-04-10 | 1993-07-06 | Norske Stats Oljeselskap | PROCEDURE FOR THE ADDITION OF SILICIDE OXIDE IN A HYDRAULIC CEMENT SUSPENSION |
GB2241499B (en) * | 1990-03-03 | 1994-09-21 | Sandoz Ltd | Concrete spraying process |
DE4106380A1 (en) * | 1990-03-03 | 1991-09-05 | Sandoz Ag | Improving rebound properties of sprayed concrete |
US5149370A (en) * | 1991-10-21 | 1992-09-22 | Halliburton Company | Well cement compositions having improved properties and methods |
FR2746095B1 (en) * | 1996-03-15 | 1998-05-22 | AQUEOUS SILICA SUSPENSIONS AND THEIR APPLICATIONS IN MINERAL BINDER COMPOSITIONS | |
US6478868B1 (en) * | 1999-08-26 | 2002-11-12 | Halliburton Energy Services, Inc. | Early-enhanced strength cement compositions and methods |
-
2002
- 2002-06-17 NO NO20022884A patent/NO316509B1/en not_active IP Right Cessation
-
2003
- 2003-04-24 EP EP03730922A patent/EP1534646B1/en not_active Expired - Lifetime
- 2003-04-24 US US10/518,154 patent/US7393407B2/en active Active
- 2003-04-24 DK DK03730922T patent/DK1534646T3/en active
- 2003-04-24 DE DE60322714T patent/DE60322714D1/en not_active Expired - Lifetime
- 2003-04-24 WO PCT/NO2003/000135 patent/WO2003106368A1/en not_active Application Discontinuation
- 2003-04-24 AU AU2003241221A patent/AU2003241221A1/en not_active Abandoned
- 2003-04-24 EA EA200500027A patent/EA008739B1/en not_active IP Right Cessation
- 2003-04-24 CA CA 2489486 patent/CA2489486C/en not_active Expired - Lifetime
- 2003-04-24 BR BRPI0311528-3B1A patent/BR0311528B1/en active IP Right Grant
- 2003-04-24 AT AT03730922T patent/ATE403631T1/en active
- 2003-04-24 MX MXPA04012028A patent/MXPA04012028A/en active IP Right Grant
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9834719B2 (en) | 2010-11-30 | 2017-12-05 | Schlumberger Technology Corporation | Methods for servicing subterranean wells |
Also Published As
Publication number | Publication date |
---|---|
EP1534646A1 (en) | 2005-06-01 |
CA2489486A1 (en) | 2003-12-24 |
US20050172864A1 (en) | 2005-08-11 |
WO2003106368A1 (en) | 2003-12-24 |
DE60322714D1 (en) | 2008-09-18 |
EA008739B1 (en) | 2007-08-31 |
DK1534646T3 (en) | 2008-12-01 |
ATE403631T1 (en) | 2008-08-15 |
NO20022884D0 (en) | 2002-06-17 |
AU2003241221A1 (en) | 2003-12-31 |
BR0311528B1 (en) | 2014-10-14 |
NO20022884L (en) | 2003-12-18 |
US7393407B2 (en) | 2008-07-01 |
CA2489486C (en) | 2009-06-09 |
MXPA04012028A (en) | 2005-03-07 |
EA200500027A1 (en) | 2005-06-30 |
NO316509B1 (en) | 2004-02-02 |
BR0311528A (en) | 2005-02-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1534646B1 (en) | Silicon oxide slurry and method for producing such slurry | |
EP3046985B1 (en) | Method of well cementing, using a delayed hydratable polymeric viscosifying agent | |
US6907928B2 (en) | Storable cementitious slurries containing boric acid and method of using the same | |
US6309455B1 (en) | Stable suspension of hydrocolloids and superplasticizer | |
KR100470034B1 (en) | Methods for improved rheological control in cementitious systems | |
US10844270B2 (en) | Method of enhancing stability of cement slurries in well cementing operations | |
EP2598457B1 (en) | Aqueous slurry of amorphous silica and method for its production | |
US7238733B2 (en) | Storable water-silica suspensions and methods | |
CA2743637C (en) | Recyclable low solid content micro-bubble drilling fluid or completion fluid | |
DE3877411T2 (en) | WELAN RUBBER IN CEMENT COMPOSITION. | |
EP0314118A2 (en) | Cementing composition comprising water-soluble, nonionic hydrophobically modified hydroxyethyl cellulose and its use | |
EP2791271B1 (en) | Wellbore servicing compositions and methods of making and using same | |
US20230031506A1 (en) | Wellbore Servicing Fluid and Methods of Making and Using Same | |
US10767098B2 (en) | Method of using sized particulates as spacer fluid | |
EP1686234A1 (en) | Cementing compositions and application thereof to cementing oil wells or the like | |
WO2016154363A1 (en) | Method of enhancing stability of cement slurries in well cementing operations | |
EP1950266A1 (en) | Solid gas migration control additives based on latex powders for cementing applications | |
Gang et al. | A green shale inhibitor developed from lignin sulfonate and the mechanism study | |
EP0314242A1 (en) | Additives for oilfield cements and corresponding cement slurries | |
CN110563428B (en) | Well cementation cement for ultra-high temperature deep well and preparation method and application thereof | |
EP3405546B1 (en) | Method of using a spacer fluid having sized particulates | |
WO2020171837A1 (en) | Method and materials to convert a drilling mud into a solid gel based lost circulation material |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20050118 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL LT LV MK |
|
R17P | Request for examination filed (corrected) |
Effective date: 20050117 |
|
DAX | Request for extension of the european patent (deleted) | ||
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: ELKEM AS |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: OLDENZIEL, COR Inventor name: DINGS YR, ELDAR, O. Inventor name: D ST L, MAGNE Inventor name: VASS Y, BJ RN |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: OLDENZIEL, COR Inventor name: VASSOY, BJORN Inventor name: DINGSOYR, ELDAR, O. Inventor name: DASTOL, MAGNE |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D |
|
REF | Corresponds to: |
Ref document number: 60322714 Country of ref document: DE Date of ref document: 20080918 Kind code of ref document: P |
|
REG | Reference to a national code |
Ref country code: RO Ref legal event code: EPE |
|
REG | Reference to a national code |
Ref country code: DK Ref legal event code: T3 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20081117 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20080806 Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20080806 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20080806 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20081106 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20090106 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20080806 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20080806 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20090507 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20080806 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20091231 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090430 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090430 Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20081106 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: MM4A |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MC Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090430 Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20091222 Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090424 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20081107 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090424 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: HU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20090207 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20080806 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20220303 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: RO Payment date: 20220328 Year of fee payment: 20 Ref country code: NL Payment date: 20220314 Year of fee payment: 20 Ref country code: IT Payment date: 20220310 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DK Payment date: 20220412 Year of fee payment: 20 Ref country code: DE Payment date: 20220302 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: TR Payment date: 20220422 Year of fee payment: 20 Ref country code: AT Payment date: 20220325 Year of fee payment: 20 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R071 Ref document number: 60322714 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MK Effective date: 20230423 |
|
REG | Reference to a national code |
Ref country code: DK Ref legal event code: EUP Expiry date: 20230424 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: PE20 Expiry date: 20230423 |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MK07 Ref document number: 403631 Country of ref document: AT Kind code of ref document: T Effective date: 20230424 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20230423 |